Launching-table for dumping-scows



2 R E B B E S LAUNOHING TABLE FOR DUMPING sgows.

Paltented Oct. 22, 1895.

W/TNESSES:

INVENTOR W MW, 9 6

)4 TTOHNE Y8.

(No Model.) 2'Sheets-Sheet- 2.

s. WEBBER. v LAUNOHING TABLE FOR. DUMPING SGOWS.

No."548,489. Patented Oct. 22; 1895.

INVENTOH WITNESSES:

8 V] F. N M n ANDREW EGRAHAM.PKBTBMTHQWASMINEIUMDL UNITED STATES PATENTrrien.

SCOTT YVEBBER, OF PIGEON COVE, MASSACHUSETTS.

LAUNCHlNG-TABLE FOR DUMPING-SCOWS.

SPECIFICATION forming part of Letters Patent No. 548,489, dated October22, 18v 5.

Application filed May 27, 1395- Seiial N0. 550: (N mode f0 ctZZ whom itmay cancer a:

Be it known that I, SCOTT WEBBER, of Pigeon Cove, in the county of Essexand State of Massachusetts, have invented a new and ImprovedLaunching-Table, of which the following is a full, clear, and exactdescription.

The invention relates to deck-dumping vessels, and its object is toprovide a new and improved launching-table which is simple and durablein construction and arranged to dump on both sides of the vesselsimultaneously and insure an even rising of the vessel after dumping toprevent careening.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

Reference is to he had to the accompanying drawings, forminga part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 isa plan view of the improvement. Fig. 2 is an enlargedsectional side elevation of the same on the line 2 2 of Fig. 1. Fig. 3is a side elevation of the locking device for the platforms. Fig. 4. isa transverse section of the improvement on the line 4 4 of Fig. 1. Fig.5 is a similar view of the same on the line 5 5 of Fig. 1, and Fig. 6 isa cross-section of the platform-locking device.

On the deck of the marine vessel A are arranged sets of platforms B B,adapted to slide outward in opposite directions over the sides of thevessel to dump the loads on the platforms, as indicated in dotted linesin Fig. 5. Normally the platforms are joined at their inner ends in thecenter line of the vessel, the said platforms being slightly inclinedoutward and downward, as will be readilyunderstood by reference to Fig.4. One, two, or more such sets of platforms may be arranged on the deckof the vessel A; butI prefer two such sets, the sets being located at ornear the middle of the vessel. Each platform is provided with the siderails B and an inner end rail B so as to securely hold theload on theplatform to prevent shifting while the vessel is in motion.

On the under side of each platform B or B are secured two sets oftransversely-extending rails O, fastened at their bases to the underside of the platform and their headsrcst- ,ing on grooved rollers D,journaled in suitable hearings in bed-stringers E, extending from oneside of the vessel to the other, as is plainly indicated in thedrawings. By this arrangement the platforms are readily slid outwardinto a dumping position whenever the platforms are released from theirnormal position, as hereinafter more fully described.

Each platform is provided on its underside with guide-irons F, abuttingagainst the inner sides of the bed-stringers E, so as to preventlongitudinal shifting of the platforms during their outward or dumpingmotion. Supports F are arranged near the outer ends of the platforms toabut against the corre sponding sides of the vessel, so as to limit theinward-sliding motion of the said platforms. A chain G, attached to theinner end of each platform B or B, extends to the other side of the deckof the vessel, to be secured thereto and to limit the outward anddownward swinging motion of the platform, as indicated in dotted linesin Fig. 5.

In order to lock the platforms in position and to permit the same toslide outward into a dumping position, I provide the under side of eachplatform with a bridle H, attached at its outer ends to the sides of theplatform at the outer end thereof, while the middle of the said bridleis connected by a rope or chain H with a keeper 1, attached to a tackleJ, connected with a capstan K, arranged on one end of the vessel A, asis plainly indicated in Fig. 1. The ropes or chains H pass over pulleysH located on the deck of the vessel A, near the center line thereof, asindicated in Fig. 1, so that the several ropes or chains H are allguided to the same keeper I to permit the operator by manipulating thecapstan K to unlock the several platforms simultaneously and to permitthe same to slide outward into a dumping position. The keeper I is alsoconnected with an emergency outhauler L for each platform, whichouthauler is secured at one end to the under side of the platform at itsinner edge adjacent to the pulleys H to then pass over a sheave L to asecond pulley L to finally connect with a keeper N, held on a tackle 0,connected with a smaller capstan P, as indicated in Fig. 1. Now, by thearrangement described, and shown in Fig. 1, the emergency outhauler Lpaysout while the ropes H haul in, and vice versa.

In order to lock the platforms B B at their inner ends and preventtipping,I provide each platform at the lower side of its inner edge witha bracket S, having a recess in its upper side, the brackets on theplatforms B overlapping those on platforms B, as shown :in Fig. 6, sothat the recesses of all the brackets will be in the same longitudinalplane, and above these brackets I suspend a vertical adjustable lockingrod or shaftR by means of chains Q, connected at their upper ends to oneseriesof platform-sections, said rod or shaft having a hand-wheel R bymeans of which it may be rotated so as to wind the said chains, andthereby raise said rod or shaft outof therecesses in the severalbrackets S when the platforms are to be tilted or lower it into therecesses and lock the platforms. The shaft R is formed in sections, onefor each opposed pair of platforms B B, separately connected bysleeve-couplings R, as shown-in Fig. 3,-so that the rod-sections may bedisconnected for releasing one or more pairs of platforms or when allthe sections are connected permit the rod or shaft to operate as asinglepart and release all of the sections.

Having thus fully described my invention, I claim as new and desire tosecureiby Letters Patent 1. The combination ofthe platform sections atopposite sides of the central longitudinal line of the deck and adaptedto slide outwardly. and dump, with winding mechanisms on the deck fromone of which extend inhauling cables connected to the outer ends of therespective platform sections and outhauling cables connected with theotherwinding mechanism and with the inner ends of said platform sectionsand guide pulleys from around which said several cables pass, onewinding mechanism serving to pay outa-its cable when the other iswinding and vice versa, substantially as described.

2. The combination of the platform sections at opposite sides of thecentral longitudinal line of the deck and adapted to slide outwardly anddump, with two windingmechanisms at one end of the deck and eachprovided with a keeper, inhauling cables extending from one keeperaround guide pulleys (H to the outer ends of the platform sections, andouthauling cables extending from the other keeper around guide'pulleys(L) to the inner endsoftherespective platform sections, one windingmechanism paying out while the other winds in and vice versa,substantially as described.

3. The combination of the deck having transverse stringers provided withrollers and the opposite pairs of outwardly sliding and dumping platformsections having transverse rails on their under sides sliding on saidrollers and also having angle irons on their under sides engaging thesides of the bed stringers, with the two winding mechanisms and theinhauling and outhauling cables extending therefrom around suitableguide pulleys to opposite ends of said platform sections, substantiallyas described.

4.. The combination with the opposed platform sections havingoverlapping brackets on the lower sides of their inner ends, of alocking device adapted to be engaged with and disengaged from saidbrackets to lock and release theiplatform sections, substantially asdescribed.

5. Thecombination with the opposed platformsections having overlappingbrackets on the lower sides of their inner ends provided with recessesor openings, of alongitudinally extending locking rod adapted to bethrown into and out of engagement with said recesses or openings to lockand release said platform sections.

6. The combination with the opposed platform sections having overlappingbrackets at the inner ends of their'lower sides, provided with recessesinitheirvupper sides and a look- .ing rod or shaft suspended freelyabove said brackets and adapted to be rotated and .thereby lowered intoor raised out of said recesses, substantially as described.

7. The combination with a series of opposed platform sections, eachopposed pair of which have overlapping recessed brackets at the in- ,nerends of their lower sides, of a longitudinal separable sectional lockingrod suspended 'freely above said brackets to be lowered into and raisedout of all said recesses when rotated or to have one or more of itssections when'uncoupled similarly operated to release the correspondingplatform sections, substantially as described.

' SCOTT WEBBER. Witnesses:

vT. ADAMS WEBBER,

EDWARD 1. WILSON.

